[Cryptech-Commits] [core/platform/common] 01/01: (1) Added segment for math cores in the core selector. (2) Added specific math core selector module. This module instantiates the modexp core. (3) Minor cleanup of file headers. The core selector is not coretest for example.

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joachim at secworks.se pushed a commit to branch master
in repository core/platform/common.

commit ecfe970a0644192547223eb100e8fa2d2c8243cc
Author: Joachim Strömbergson <joachim at secworks.se>
Date:   Mon Apr 27 13:45:25 2015 +0200

    (1) Added segment for math cores in the core selector. (2) Added specific math core selector module. This module instantiates the modexp core. (3) Minor cleanup of file headers. The core selector is not coretest for example.
---
 core_selector/src/rtl/math_selector.v | 78 +++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/core_selector/src/rtl/math_selector.v b/core_selector/src/rtl/math_selector.v
new file mode 100644
index 0000000..3c29554
--- /dev/null
+++ b/core_selector/src/rtl/math_selector.v
@@ -0,0 +1,78 @@
+//======================================================================
+//
+// math_selector.v
+// ---------------
+// Selector of math cores. Currently there is only one core in math -
+// the modexp core. That core uses 12 bits and we simply ignore the
+// top two bits of the address. If we add more math cores we will
+// use these bits to select cores here.
+//
+//
+//
+// Authors: Joachim Strombergson, Paul Selkirk, Pavel Shatov
+// Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// - Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright
+//   notice, this list of conditions and the following disclaimer in the
+//   documentation and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may
+//   be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+//======================================================================
+
+module math_selector
+  (
+   input wire           sys_clk,
+   input wire           sys_rst,
+   input wire           sys_ena,
+
+   input wire [13: 0]   sys_eim_addr,
+   input wire           sys_eim_wr,
+   input wire           sys_eim_rd,
+   output wire [31 : 0] sys_read_data,
+   input wire [31 : 0]  sys_write_data
+   );
+
+
+   //
+   // Output Register
+   //
+   reg [31: 0]            tmp_read_data;
+   assign sys_read_data = tmp_read_data;
+
+
+  modexp modexp_inst(
+                     .clk(sys_clk),
+                     .reset_n(~sys_rst),
+                     .cs(sys_ena),
+                     .we(sys_eim_wr),
+                     .address(sys_eim_addr[11 : 0]),
+                     .write_data(sys_write_data),
+                     .read_data(sys_read_data)
+                    );
+
+endmodule // math_selector
+
+//======================================================================
+// EOF math_selector.v
+//======================================================================